Switch from 'nix eval' to 'nix-instantiate --eval'

Nix 2.4 changed the interface to 'nix eval' so that --arg doesn't work anymore.

This is a workaround for https://github.com/NixOS/nix/issues/2678

diff --git a/modules/auto-upgrade.nix b/modules/auto-upgrade.nix
index 54a30835d490a8215af0875868b921eac59d7abd..4a5aa83582e1c06fd5d1e81d89a65e0dc34cd74e 100644 (file)
--- a/modules/auto-upgrade.nix
+++ b/modules/auto-upgrade.nix
@@ -144,12 +144,12 @@ let
           + concatMapStringsSep "\n" (f: "verify_ownership ${escapeShellArg f}")
           cfg.upgradeConfig)}
 
-        config=$(${pkgs.nix}/bin/nix eval --json -f ${../upgrade-config.nix} \
+        config=$(${pkgs.nix}/bin/nix-instantiate --eval --strict --json -A config \
           --arg upgradeConfig ${
             escapeShellArg ("["
               + lib.concatMapStringsSep " " lib.strings.escapeNixString
               cfg.upgradeConfig + "]")
-          } config)
+          } ${../upgrade-config.nix})
 
         config_query() {
           ${pkgs.jq}/bin/jq -r "$@" <<< "$config"